Calculators

Langelier Saturation Index

Instructions:
This calculator generates the Langelier Saturation Index (LSI) for a pool or spa. The LSI assesses the overall balance of the water.

  1. In the appropriate box below, enter the temperature in degrees Fahrenheit. Be sure to use the temperature at which you regularly maintain the pool or hot tub.
  2. Use your AquaChek test strips to measure the pH, alkalinity, cyanuric acid (if any is present), total hardness and total dissolved solids (TDS).
  3. Click on the Calculate Saturation Index button to determine whether your water is corrosive, balanced or scale-forming. Note: you must enter all parameters to calculate this index correctly.

 

pH A value is required.Invalid format.
Temperature A value is required.Invalid format. F
Alkalinity A value is required.Invalid format. ppm
Cyanuric Acid A value is required.Invalid format. ppm
Calcium Hardness A value is required.Invalid format. ppm
Total Dissolved Solids ( TDS ) A value is required.Invalid format. ppm